Courage is a generous act that involves risk.
It’s not courageous to hang out with friends and make a crank phone call.
The risk involved might be actual risk (it took courage to go to the moon) or it might feel risky (raising your hand at a meeting to ask a useful question probably has no real downside but it feels that way).
Too often, we get hung up on how risky it feels, and fail to focus enough on how generous the work is. Generosity is a great antidote to fear.